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eAG Formula:
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eAG (Estimated Average Glucose) is a calculated value that represents the average blood glucose level over the past 2-3 months. It is derived from HbA1c (glycated hemoglobin) measurements and provides glucose levels in the same units (mg/dL) as daily glucose monitoring.
The calculator uses the eAG formula:
Where:
Explanation: This linear equation converts HbA1c percentage values into estimated average glucose levels in mg/dL, providing a more intuitive understanding of average blood glucose control.
Details: eAG helps patients and healthcare providers better understand what HbA1c results mean in terms of daily glucose levels. It bridges the gap between HbA1c measurements and self-monitored blood glucose values, making diabetes management more comprehensible.
Tips: Enter HbA1c value as a percentage (e.g., 6.5, 7.0, 8.2). The value must be greater than 0. The calculator will provide the estimated average glucose in mg/dL.
Q1: Why convert HbA1c to eAG?
A: eAG provides glucose levels in familiar units (mg/dL) that patients use for daily monitoring, making HbA1c results more meaningful and actionable.
Q2: How accurate is the eAG calculation?
A: The formula provides a good estimate for most people, but individual variations in red blood cell lifespan and glucose metabolism can affect accuracy.
Q3: What are normal eAG values?
A: For non-diabetic individuals, eAG is typically around 115-125 mg/dL. Diabetes treatment goals vary but often aim for eAG below 154 mg/dL (HbA1c < 7%).
Q4: Can eAG replace daily glucose monitoring?
A: No, eAG provides an average over time but doesn't show glucose variability or hypoglycemic episodes. Daily monitoring remains essential for diabetes management.
Q5: Are there limitations to this conversion?
A: The formula may be less accurate in conditions that affect red blood cell turnover, such as anemia, hemoglobinopathies, or recent blood transfusions.